ArticlePloS one2014
Terreneuvian orthothecid (Hyolitha) digestive tracts from northern Montagne Noire, France; taphonomic, ontogenetic and phylogenetic implications.
Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- New insight into the soft anatomy and shell microstructures of early Cambrian orthothecids (Hyolitha).Proceedings. Biological sciences · 2020Article
- Hyoliths with pedicles illuminate the origin of the brachiopod body plan.Proceedings. Biological sciences · 2018Article
- Hyoliths are Palaeozoic lophophorates.Nature · 2017Article
- Ecological innovations in the Cambrian and the origins of the crown group phyla.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016Article
- Experimental taphonomy of Artemia reveals the role of endogenous microbes in mediating decay and fossilization.Proceedings. Biological sciences · 2015Article
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5 authors.
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Abstract
More than 285 specimens of Conotheca subcurvata with three-dimensionally preserved digestive tracts were recovered from the Terreneuvian (early Cambrian) Heraultia Limestone of the northern Montagne Noire, southern France. They represent one of the oldest occurrences of such preserved guts. The newly discovered operculum of some complete specimens provides additional data allowing emendation of the species diagnosis. Infestation of the U-shaped digestive tracts by smooth uniseriate, branching to anastomosing filaments along with isolated botryoidal coccoids attests to their early, microbially mediated phosphatisation. Apart from taphonomic deformation, C. subcurvata exhibits three different configurations of the digestive tract: (1) anal tube and gut parallel, straight to slightly undulating; (2) anal tube straight and loosely folded gut; and (3) anal tube straight and gut straight with local zigzag folds. The arrangement of the digestive tracts and its correlation with the mean apertural diameter of the specimens are interpreted as ontogenetically dependent. The simple U-shaped gut, usually considered as characteristic of the Hyolithida, developed in earlier stages of C. subcurvata, whereas the more complex orthothecid type-3 only appears in largest specimens. This growth pattern suggests a distinct phylogenetic relationship between these two hyolith orders through heterochronic processes.
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